Image sensor with shared low conversion gain capacitor
The shared low conversion gain capacitor system in image sensors addresses capacitance limitations by coupling adjacent pixel cell capacitors, enhancing dynamic range and signal-to-noise ratio through adjustable capacitance and smoother mode transitions.
US20260143258A1Pending Publication Date: 2026-05-21OMNIVISION TECHNOLOGIES INC
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Patent Information
- Authority / Receiving Office
- US · United States
- Patent Type
- Applications(United States)
- Current Assignee / Owner
- OMNIVISION TECHNOLOGIES INC
- Filing Date
- 2024-11-21
- Publication Date
- 2026-05-21
Smart Images
Figure US20260143258A1-D00000_ABST
Abstract
An image sensor comprising a pixel cell array is described. The pixel cell array includes a plurality of pixel cells arranged in rows and columns. Individual pixel cells included in the plurality of pixel cells each includes one or more photodiodes configured to photogenerate image charge in response to incident light, a first floating diffusion, a second floating diffusion, a third floating diffusion, a dual floating diffusion transistor coupled between the first floating diffusion and the second floating diffusion, a lateral overflow transistor coupled between the first floating diffusion and the third floating diffusion, and a shared low conversion gain capacitor. The dual floating diffusion transistor and the lateral overflow transistor are coupled in parallel to the first floating diffusion. The second floating diffusion is coupled between the shared low conversion gain capacitor and the first floating diffusion.
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